Gas-engine governor.



N6. 870,629. PATENTED NOV. 12, 1907. E. P. JOHNSON & O. I. LEE.

GAS ENGINE GOVERNOR.

APPLIOATIQN FILED MAY 2,1906.

3 SHEETSSBIEBT 1.

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l5 i/j /75 7 v v Snueufoid/ 6w? .FQ/fihsarz, mamas 6 0 No. 870,629. v PATENTED NOV. 12, 1907.

E. P. JOHNSON & 0. I. LEE.

GAS ENGINE GOVERNOR.

APPLICATION FILED MAY 2.1906.

3 SHEETS-SHEET 2.

attained N0. 870,629. PATBNTED-NOV. 12, 1907. E. P. JOHNSON & G. I. LEE.

GAS ENGINE GOVERNOR.

APPLICATION I'ILED MAY 2,1906;

3 SHEETS-SHEET 3.

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v s'ra'rns ATENT anion.

EUGIE P. JOHNSON AND CHESTER I. LEE, OF HARTSELLS, ALABAMA.

GAS-ENGINE GOVERNQR.

Specification of Letters Patent.

Patented Nov. 12, 1907} Application filed May 2. 1906. Serial No. 314.794-

, objectof the invention being to provide a governor especially designed for use in connectionwith explosive gas engines, whereby provision is made for automatically stopping the cam shaft with a positive action when an excessive speed is attained by the name shaft; secondly, to locate the stopping device in such position as to hold the exhaust valve open and the electrodes apart while the cam shaft is not in motion; third, to providefor changing the speed of the engine while thesame is in operation; fourth, to provide for stopping the engine by a hand device which throws into operation the automatic devices referred to, which has the effect of preventing the explosive mixture from enteringthe cylinder or cylinders, and also breaking the electrical circuit so as to avoid the possibility of ignitinga charge remaining in any one or more of the cylinders; fifth, to provide for holding the cam shaft in such position that the exhaust yalve is open, thereby allowing for the ingress and egress of air toand from the cylinder or cylinders until a sufficient motion of the fly wheel has been obtained to compress the charges in the cylinders before such charges are admitted.

' With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction,

combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

In the accompanying drawings, Figure 1 is a sec-' tional view of the automatic governor mechanism of this invention. Fig. 2 is a section through the governorhead. Fig. 3 is a detail section similar to the lower portion of Fig. 1, showing the different position of the parts involved. Fig. 4 is a vertical cross-section 0n the line 4'4 of Fig. 3. Fig. 5 is a vertical crosssection on the line 5-5 of Fig. 3. ,Fig. 6 is a vertical cross-section on the line 6 -6.of Fig. 3. Fig. 7 is a plan view of the latch. Fig. 8 is a face view of the mechanism, the saiiie being partly broken away. Fig. 9 is an inside face view of thelatch setting or throwing head. Fig. 10 is a sectional view of the same, taken in line with the pivot bolt or screw thereof. Fig. 11

is a sectional view of the latch throwing head, taken on theline 1111 of Fig. 9. Fig. 12 is a vertical crosssection on the line 1212 of Fig. 3. Fig. 13 is a section on theline 13-43 of Fig. 12. Fig; 14 is a sectional detail on the line 14-14, Fig. 6.

Referring to the drawings, 1 designates the engine shaft which, in carrying out the present invention, is

provided with a driving worm wheel 2 fast thereon and meshing with a driven worm wheel 3 on the cam shaft 4 which operates the intake and exhaust valves and an ignition apparatus of an ordinary gasolcne engine, the

parts last referred to not being shown in the accompany'ing drawings but being of the ordinary construetion well'known to those familiar with the art to .which this invention appertains.

. The operative parts and bearings of the mechanism constituting the governor of this invention are all mounted upon and carried bya bracket or frame plate 5 secured to the enginebcd or other suitable support, said bracket or frame plate carrying a box 6 in which the cam shaft 4 is journaled, as shown in Fig. 1, and provided with a stop collar 7 to prevent end-thrust of said cam shaft.

Mounted upon the shaft 4 is a collar 7 keyed thereto, as shown at 8, so as to revolve therewith. The shaft 4, for a portion of its length, is made tubular or provided with a central longitudinal bore 9 in which is slidingly mounted a key 10 having an integral radially projecting lug 11 which, at one end of its throw, is received in a notch 12 in the wheel 3, as shown in Figs. 1 and 3.

' The lug 11 is normally held in engagement with the notch 12 of the wheel 3 by means of a key-thrust spring 13 .contained within the bore 9 of the shaft 4, as best shown in Fig. 1, said spring being compressible lengthwise to allow the lug 11 to move out of engagement with the notch 12 and into engagement with a notch 14 in the stationary bearing box 6 for the purppse of locking the cam shaft 4 and preventing its rotation.

Mounted beyond and in line with the key 10 is a second sliding key 15 having a radially projecting lug 16 which works back and forth in a slot or way 17 in the collar 7, as shown in Figs. 1 and 3, said lug, in the rotation of the shaft 4, coming in contact with the cam-shaped head 18 of a sliding latch 19 mounted in a suitable bearing opening in the frame plate or bracket by which the governor is supported, the said lug-16 cofiperating with the head of the latch so as to move said latch lengthwise to reciprocate the same once in each revolution of the cam shaft when said latch is free.

Extending upward from the frame-plate or bracket 5 is a governor post 20 around which is placed a governor sleeve 21 having a worm gear wheel 22 which meshes with and is driven by the worm wheel 2 on the engine shaft. At its upper end, the sleeve 21 has pivotally mounted thereon the governor arms 23 carrying the balls or weights 24 at their outer ends and having elbow extensions 25 which bear against the flange or annular shoulder 26 of a head 27 carried by the upper end of a Presser-rod or stem 28 which extends downward through the governor post 20 and has its lower end arranged to bear against the upper e gtremity of a sliding catch 29.

Thecatch 29, which is movable up and down ina suitable bearing opening in theframe-plate or bracket,

is provided at its lower'end with a catch lip or shoulder 30 which is adapted to enter a lock notch 31 in theadjacent side of the latch'19, as clearly shown in Figs. 2 and 3, the latch being shown free in Fig. 1, while it is shown locked by the catch 29 in Fig. 3. The catch 29 is provided with-a "radially projecting pin 32 which works in a slot 33 in the bracket and having its free end pivotally connected at 36 to a tension device consisting of a rod or stem 37 movable up and down through a guide .38 on the frame,'"the lever 34 being normally held-upward by means of :a' tension spring 39 which encircles the rod or -sterni37 and is confined between the stationary guide 38 and an adjustable collar or nut 40 threaded upon the stem 37. By means of the adjustable collar 40, the tension of the spring 39 may be regulated to afford the necessary resistance to thedownward. movement of the catch 29,the speed at which the engineiruns andat which it will automatically throw the cam shaft out of operation, being regulated by moving the nut 40 to increase or diminish the tension ofthe spring. 41 designates a lock nut'for maintaining the djustment of the nut 40,; v The latch 19 is provided in its rear end with a longi- H tudinal bore of recess in which is mounted a thrust spring .42 backed up by a latch setting-pin 43, the outer end of which isreceived in a groove 44 extending part way around the inner surface of a latch setting or throwing head 45 which is mounted to turn on a stud or bearing-screw 46 connected with the bracket or frame asshown in Fig. 10. It will be understood that. by

turning the head 45, the latch is'held in the same positionas when locked by the catch 29 as shown in Fig: 3. v

The" operation ofthe machine is as follows. When the speed of the engine becomes too high, the governor arms 23 are moved upward sufficiently to depress the resser-rod 28 and cause thecatch-lip 30 thereof to enter the notch 3ljoi the latch 19' when said latch moves inward. This 1 causes the cam-shaped head ,18 of the latch to protrude, and in view of the tact that the latch is held locked by the catch 29, 16in the rotation of the cam-shaft, comes in contactiwith said head and as the latch cannot give outward,,the key l5fis moved inward and, by, comingin contact the key-10,.

forces the said key inward against the tensionof the spring 13, thus moving the ll-outoferigagement with the notch 12. This unlocks the wheel 31from e 4- and, at the same time, locksthe'shaft l to the engine open. The wheel Scout intros to revolve 1 the wheel 2 until the speed of the engine decreases, reup on, a I cam-shaped lug,4'7. oi1; the. worm wheel 1 comes in contact with lug 11 on key'lfl for'cing it just bearing box 6 in position to hold the eirhaust valve "'ttle against the tension ofspring' 13 for hepurpo'se as described.

'and the operation of the engine is continued, as before.

By adjusting the tension of the spring 39 in the manner hereinabove-described, the speed at which the engine will automatically throw the cam-shaft out of operation I and lock itagainst rotation is determined.

I claim:

' 1. The combination with the rotary shaft of a gas engine, of a.-caln-shaft for controlling the valve mechanism, co acting gears on said shafts, a sliding spring seated-key adapted to lock one of said gears to the cam-shaft and unlock thesam, a latch for throwing said key, and a governor operating upon the attainment of a certain speed tension of'said spring, and disconnect the gear wheel the cam-shaft.

2. The combination with the rotary shaft of a gas engine, of a cam-shaft for controlling the valve mechanism, intermeshing gears on said shafts, a governor: geared to the; engine shaft and driven thereby, a sliding key movable in one direction by a spring and shiftable'to connect the camshaft with its gear or with a stationary abutment, a latch for shifting said key, and a latch controlled by the governor for locking the latch in position toshlft the key.

The combination with the rotary shaft of a gas engine, of a cam-shaft for controlling the valve mechanism, intermeshing gears on said shafts, a governor geared to the enginersha ffl a shiftable key carried'by the cam-shaft in to lock said latch in position to shift the keyagainst the one position. to lock the gear .of said shaft thereon and in another position to disconnect said gearfrom the corn shaft, a thrust-spring operating to force said key in one direction, a latch for shifting the key, and :1 self-retract- .-lng catch adapted to be thrown by the governor into hold lug engagement with the latch for positioning said latch to shift the key.

' 4. The combination with the rotary shaft of, an'engine,

of a cam-shaft" for controllingthe valve mechanism, inter-' meshing gears on said shafts, a shiftable key for throw lug one of the gears into 'and out of engagement with the camshaft, a governor geared to the engine shaft, a latch for sbiftingthe key, and means actuated by the camshaft, and adapted to be-actuated by the latch forshifting the key, a springffor thrusting the latchjnto operative' position for shifting the'key, and a catch operated by the governor forliolding vthe latch in position to shift thekey.

. 5. The combination with themotary shaft of-an engine, or a cam-shaft forcontrolling the valve mechanism, inter meshing gears thereon, aslsrifta'ble key for connecting one of said gears .to the camsh aft and disconnecting the same therefrom, a key thrusting spring seated in the cam-shaft,

'a latch for throwing the key shifting device, means for urging the latch to a'position where it will operate upon the key shitting device, acatch operated by the governor for loc king and unlocking the latch, means for resisting the movement of the catch toward its locking position,

and means for-adjusting the degree of resistance of said catch. v

.mesbing gears .on said shafts, ashiitablekey for connecting one of said gears'to and disconnecting the .same from the cam-shaft, a key-shifting device actuatedby the,

camshaft, a selfpo sitioning latch for'actuating the key shiftingdevlce, a governor geared to the engine-shaft, a

selfretractingvcatch adapted to be thrown by the'gov: e'i-nor into locked engagement with the latch, and manually" operablemeans adjustable while the engine is in motion for varying, the degree of resistance of'the'catch to the force applied thereto by the governor, substantially 

